SAE AMS6290 Steel Bars and Forgings, Carburizing 1.8Ni - 0.25Mo (0.11-0.17C) (SAE 4615)
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来源:标准资料网
Product Code:SAE AMS6290
Title:Steel Bars and Forgings, Carburizing 1.8Ni - 0.25Mo (0.11-0.17C) (SAE 4615)
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope:This specification covers an aircraft-quality, low alloy steel in the form of bars, forgings, and forging stock.
基本信息
| 标准名称： | 机床辅助工具技术条件 |
| 中标分类： |
航空、航天 >>
航空器与航天器制造用设备 >>
工具 |
| ICS分类： |
机械制造 >>
机床 >>
机床综合
|
| 发布日期： | 1986-04-05 |
| 实施日期： | 1988-04-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 航空 航天 航空器与航天器制造用设备 工具 机械制造 机床 机床综合
【英文标准名称】:StandardTestMethodforAcidandBaseNumberbyColor-IndicatorTitration
【原文标准名称】:用颜色指示剂滴定法测定酸碱值的标准试验方法
【标准号】:ASTMD974-2008e1
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:acidnumber;basenumber;colorindicationtitration;petroleumproducts;Acidity,alkalinity,pH--petroleumproducts;Acidnumber--petroleumproducts;Color--petroleumproducts;Color-indicatortitration;Neutralizationnumbers
【摘要】:Newandusedpetroleumproductscancontainbasicoracidicconstituentsthatarepresentasadditivesorasdegradationproductsformedduringservice,suchasoxidationproducts.Therelativeamountofthesematerialscanbedeterminedbytitratingwithacidsorbases.Thisnumber,whetherexpressedasacidnumberorbasenumber,isameasureofthisamountofacidicorbasicsubstances,respectively,intheoilalwaysundertheconditionsofthetest.Thisnumberisusedasaguideinthequalitycontroloflubricatingoilformulations.Itisalsosometimesusedasameasureoflubricantdegradationinservice;however,anycondemninglimitsmustbeempiricallyestablished.Sinceavarietyofoxidationproductscontributetotheacidnumberandtheorganicacidsvarywidelyincorrosiveproperties,thetestcannotbeusedtopredictcorrosivenessofanoilunderserviceconditions.Nogeneralcorrelationisknownbetweenacidnumberandthecorrosivetendencyofoilstowardmetals.Compoundedengineoilscanandusuallydohavebothacidandbasenumbersinthistestmethod.1.1Thistestmethodcoversthedeterminationofacidicorbasicconstituents(Note1)inpetroleumproductsandlubricantssolubleornearlysolubleinmixturesoftolueneandisopropylalcohol.Itisapplicableforthedeterminationofacidsorbaseswhosedissociationconstantsinwaterarelargerthan10x2212;9;extremelyweakacidsorbaseswhosedissociationconstantsaresmallerthan10x2212;9donotinterfere.Saltsreactiftheirhydrolysisconstantsarelargerthan10x2212;9.Note18212;Innewandusedoils,theconstituentsconsideredtohaveacidiccharacteristicsincludeorganicandinorganicacids,esters,phenoliccompounds,lactones,resins,saltsofheavymetals,andadditionagentssuchasinhibitorsanddetergents.Similarly,constituentsconsideredtohavebasicpropertiesincludeorganicandinorganicbases,aminocompounds,saltsofweakacids(soaps),basicsaltsofpolyacidicbases,saltsofheavymetals,andadditionagentssuchasinhibitorsanddetergents.Note28212;Thistestmethodisnotsuitableformeasuringthebasicconstituentsofmanybasicadditive-typelubricatingoils.TestMethodD4739canbeusedforthispurpose.1.2Thistestmethodcanbeusedtoindicaterelativechangesthatoccurinanoilduringuseunderoxidizingconditions.Althoughthetitrationismadeunderdefiniteequilibriumconditions,themethoddoesnotmeasureanabsoluteacidicorbasicpropertythatcanbeusedtopredictperformanceofanoilunderserviceconditions.Nogeneralrelationshipbetweenbearingcorrosionandacidorbasenumbersisknown.Note38212;Oils,suchasmanycuttingoils,rustproofingoils,andsimilarcompoundedoils,orexcessivelydark-coloredoils,thatcannotbeanalyzedforacidnumberbythistestmethodduetoobscurityofthecolor-indicatorendpoint,canbeanalyzedbyTestMethodD664.Theacidnumbersobtainedbythiscolor-indicatortestmethodneednotbenumericallythesameasthoseobtainedbyTestMethodD664,thebasenumbersobtainedbythiscolorindicatortestmethodneednotbenumericallythesameasthoseobtainedbyTestMethod
